Diversity of carboxylate coordination in two novel zinc(II) cinnamate complexes |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Key Laboratory of Functional Small Organic Molecule of Ministry of Education, Jiangxi Normal University, Nanchang, Jiangxi 330022, PR China;2. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, PR China;1. School of Chemical Engineering, Changchun University of Technology, Changchun 130012, PR China;2. College of Chemistry, Jilin University, Changchun 130023, PR China;1. Nikolaev Institute of Inorganic Chemistry SB RAS, Lavrentieva st. 3, Novosibirsk 630090, Russia;2. Novosibirsk State University, Pirogova st. 2, Novosibirsk 630090, Russia |
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| Abstract: | Two novel mixed-ligand zinc(II) complex compounds Zn(cinn)2(mpcm)]n (1) and Zn(p-HO-cinn)2(nia)(H2O)2] · H2O (2) (cinn = cinnamato, mpcm = methyl-3-pyridylcarbamate, nia = nicotinamide) were prepared and characterized by elemental analysis, infrared spectroscopy, single crystal X-ray diffraction and thermal analysis. Diverse modes of carboxylate coordination were found in the complexes. In 1 the cinnamate ligands coordinate as monodentate and bridging (syn–anti), respectively. The syn–anti carboxylate bridges connect the molecules of 1 to infinite polymeric helical chains. The structure of 2 is monomeric. One of the carboxylate oxygens of p-hydroxycinnamate is semi-coordinated (Zn–O = 2.549(2) Å). |
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